Multiplex DG 300 Quarter scale glider- assembly and conversion to electric.

[Michael]

Really well done!

[Frank v B]

Flying the 100" Flamingo last Sunday (maiden flight https://temac.ca/smf/index.php?topic=8933.0) inspired me to re-start this 145" project.  Photo of the 100" plane is below.

Status:
- fuse and built with radio installed, motor installed and canopy finished.

Next Step- The wings.

Problem: this kit was bought "as-is" with parts missing. 
Main things missing: canopy (built one), spoiler parts (the mechanism was installed in the wing but the actual spoiler plates that move up and down are missing) and aileron/spoiler push rods (piano wire).

Decision:
The kit-supplied belcranks for the ailerons fit fine but they require 44" piano wire lengths to run inside the tubes already installed in the wings. Maximum length of hobby piano wire is 36".  No room for a joint.  A joint is risky as well.  decision- install a servo in each wing.  Problem- running the wire inside the wing without cutting the Obechie wood covering.

Next steps
- remove the factory installed aileron pushrod tube and use the slot to fish the wires for the servo.
- find some small powerful servos.  (metal gear)
- commence surgery.

The photo shows the old belcrank system supplied by the manufacturer that will not work.

Frank

ps: my camera only works in Selfie mode. That's why I am in the picture.  Sorry to scare you.

[Andy Hoffer]

That's why I am in the picture.  Sorry to scare you.

@Frank v B you are entering Stephen Edwin King territory.  Tread carefully!!

Andy

[Frank v B]

 Working along.

- fished the aileron servo wires
- covered the wings with red Monokote that I had in stock.  The only problem was there were 2 shades of red with only less than a 5% colour difference.  Used the darker shade of red on all the bottoms (wing, ailerons, stab/elevator). Used the brighter red on all the tops.  Tough to see the difference but now you know.  SSHHH!!
This model has a 12' wingspan and I did not want to buy new covering.

Note: the spoilers were missing parts so I covered the spoiler slots.  When I get the right materials I will install them.  This should not stop me from maidening this plane.


Frank

ps: no photos because my iPhone camera does not like me and will not work.  I tried to use it as a flip phone.    Had it in by back pocket with my car keys...then sat down.  Crunch.

[Frank v B]

Assembled the wings- hinged the elevator and both ailerons.

I used pin hinges: steps
- put a drop of oil on the hinge portion so the glue will not stick.
- used 5 minute epoxy and inserted and glued the hinges in one surface and let it cure overnight.
- put 5 minute epoxy on the wings and stab and inserted the hinges in their slots.
- taped the moving surface at the ends so it will not slip out of place while the glue cures.  It's a killer if it does.  I have had it happen and it is a lot of work to re-do.  See photo 85 of the aileron tape and photo 86 for the elevator taping.

Frank

[Frank v B]

Everything is finished except the one evening's worth of work when the metal gear servos arrive for the ailerons.

Nice project but big!!!!!

Will definitely enlist Glenn's help for the maiden flight in the spring.
Will probably end up using his glider launching dolly.

Frank

[Andy Hoffer]

"ps: no photos because my iPhone camera does not like me and will not work.  I tried to use it as a flip phone.    Had it in by back pocket with my car keys...then sat down.  Crunch."

Well, that gets rid of the fill flash problem!!

Andy